<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.p1,.p2,.p3 {
				color: #f00;
			}
			
			div.c1 {
				background-color: #0ff;
			}
		</style>
	</head>
	<body>
		<p class="p1">p1</p>
		<p class="p2">p2</p>
		<p class="p3">p3</p>
		<div class="c1">div1</div>
		<p class="c1">div2</p>
	</body>
</html>